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Audio feature extraction method and device

A technology of audio features and extraction methods, applied in speech analysis, instruments, etc., can solve the problem of few applications in the field of audio processing, and achieve the effect of efficient extraction and improved efficiency

Active Publication Date: 2017-12-08
TENCENT MUSIC ENTERTAINMENT TECH SHENZHEN CO LTD
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Problems solved by technology

[0002] Feature extraction is usually used in image processing, but less in the field of audio processing

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  • Audio feature extraction method and device
  • Audio feature extraction method and device

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] Figure 1A is a flow chart of the audio feature extraction method provided in one embodiment of the present invention, such as Figure 1A As shown, the audio feature extraction method includes the following steps.

[0028] In step 101, the audio signal is divided into multiple frames by using a window function with a window length M to obtain a sample signal, where M is a natural number.

[0029] In the embodiment of the present invention, the audio signal in the audio file belongs to a short-term stable process. By performing frame division and windowing, the audio signal is segmented and processed to obtain a frame signal that is regarded as a stable process. After the frame division and windowing, the The audio signal of is t...

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Abstract

The invention discloses an audio feature extraction method and device and belongs to the field of audio processing. The audio feature extraction method includes dividing audio signals into multiple frames through a window function having a window length of M and obtaining sample signals; screening signal frames whose corresponding energy values are in a first energy section from the sample signals; determining an upper limit value and a lower limit value of a second energy section according to the energy values corresponding to the signal frames meeting predetermined conditions; in the screened signal frames, determining the signal frames whose corresponding energy values are in the second energy section are determined as feature frames of the audio signals. The invention solves a problem of increase of follow-up audio processing load due to less feature extraction on audio signals in audio processing field application in the related art. Efficient extraction of features of the audio signals is achieved and an effect of improving follow-up audio processing efficiency is realized.

Description

technical field [0001] Embodiments of the present invention relate to the field of audio processing, and in particular to an audio feature extraction method and device. Background technique [0002] Feature extraction is usually used in image processing, but less in the field of audio processing. [0003] However, audio features are required in application scenarios such as content-based music identification (Music Identification) service, similar music recommendation (Music Recommendation) service, and other audio identification services. [0004] Therefore, how to effectively extract features from audio signals has become an urgent problem to be solved. Contents of the invention [0005] In order to solve the problems existing in the prior art, an embodiment of the present invention provides an audio feature extraction method and device. The technical solution is as follows: [0006] According to a first aspect of an embodiment of the present invention, an audio featu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L25/45G10L25/21G10L25/78
CPCG10L25/21G10L25/45G10L25/78G10L2025/783
Inventor 赵伟峰
Owner TENCENT MUSIC ENTERTAINMENT TECH SHENZHEN CO LTD
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